Japan – Kamimashiki County

This page summarizes earthquakes in Kamimashiki County (Japan). The most recently recorded event was a magnitude M3.1 earthquake near Kosa on 2026-07-28 13:33:30 UTC. All event lists and map markers are limited to the last 30 days.

Earthquakes (last 30 days)

Max magnitude (last 30 days)

M6.4

Avg magnitude (last 30 days)

M4.09

Avg depth (last 30 days)

9 km

Seismic activity in 2026

In 2026, Kamimashiki County recorded 10 earthquakes within Japan. The average magnitude was M4.09. The strongest event reached M6.4.

Located on the Amur Plate.

Map (last 30 days)

< 2 2–4 4–5 ≥ 5

Earthquakes in Kamimashiki County (last 30 days)

M3.1

Kosa

2026-07-28 · 13:33 UTC · 10 km

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M3.3

Kosa

2026-07-28 · 13:23 UTC · 10 km

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M3.2

Kosa

2026-07-28 · 11:04 UTC · 10 km

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M3.3

Kosa

2026-07-28 · 10:07 UTC · 10 km

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M3.3

Kosa

2026-07-28 · 09:50 UTC · 10 km

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M3.4

Kosa

2026-07-28 · 09:39 UTC · 10 km

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M3.0

Mashiki

2026-07-28 · 09:08 UTC · 0 km

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M3.1

Kosa

2026-07-28 · 08:14 UTC · 10 km

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M4.2

Kosa

2026-07-28 · 07:39 UTC · 10 km

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M6.4

Yamato

2026-07-28 · 07:27 UTC · 10 km

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